cathode-ray tube

The definition of a cathode-ray tube (CRT) is a vacuum tube that creates an image on a fluorescent screen when struck by an electromagnetically charged beam.

An example of a cathode-ray tube is what televisions and computers used to create images before LED and LCD were introduced.

cathode-ray tube

a vacuum tube in which a stream of electrons is electromagnetically focused on a fluorescent screen, producing lighted dots: such tubes are used as oscilloscopes and picture tubes: abbrev. CRT

cathode-ray tube

noun

A vacuum tube, used in monitors and televisions, in which a hot cathode emits electrons that are accelerated as a beam through a relatively high voltage anode, further focused or deflected electrostatically or electromagnetically, and allowed to fall on a phosphorescent screen.

cathode-ray tube

cathode-ray tube

Noun

(plural cathode ray tubes)

(electronics) A vacuum tube that displays still or moving images (such as for a television), by controlling the direction of a cathode ray emitted towards the front of the tube. The front is coated by a layer of fluorescent material, so that it emits light when struck by the beam.